The DL-based PHY can be categorized in two approaches: 1) Complete transmitter and receiver are replaced with respective DL architectures [1]}, [2]}, 2) Independent DL blocks for each sub-block or combination of sub-blocks in PHY [3]}, [4]}, [5]}, [6]}, [7]}, [8]}. The drawback of the first approach is that it may not provide intermediate outputs such as channel status indicator, precoding, and channel rank feedback, making them incompatible with existing standards. Furthermore, existing works can not support high throughput requirements. In this paper, we focus on the second approach addressing the channel estimation task in wireless PHY.
